Answer:
It's important for a scientist to try to hold all variables constant except for the independent variable. If a control variable changes during an experiment, it may invalidate the correlation between the dependent and independent variable. When possible, control variables should be identified, measured, and recorded.
Answer:
<u>c. Sucrose and glucose</u>
Explanation:
The paramecium is a large, single-celled microbes, surrounded by a plasma membrane. Simple diffusion occurs in cells across plasma membranes, as a form of passive transport. In diffusion, solutes move from regions of high concentration to regions of low concentration across the plasma membrane.
Here, the internal environment has higher concentrations of sucrose and glucose, but lower concentrations of fructose, thus the solutes will move along their concentration gradient, to where the concentrations are lower. In order for the fructose molecules to move out of the cell, the molecules have to move against their concentration gradient - a process requiring energy known as active transport.
Explanation:
El dolor en la articulación metatarsofalángica se debe a cambios tisulares debidos a una biomecánica aberrante del pie. Los signos y síntomas incluyen dolor al caminar y dolor a la presión. El diagnóstico es clínico; sin embargo, deben realizarse estudios para excluir infecciones o enfermedades reumáticas sistémicas (como la artritis reumatoidea). El tratamiento incluye ortesis, a veces inyección local, y en ocasiones cirugía.
The ecological succession that occurs in a lava field is as follows:
- Moss and lichen arrive by birds to barren lava field.
- Soil is created.
- Fountain grass grows.
- Monkeypod trees grow.
<h3>What is ecological succession?</h3>
Ecological succession refers to the series of changes that occur in a habitat gradually with new species replacing existing species or a barren habitat until the environment becomes more complex.
A lava field is a barren field where there are no species
The ecological succession that occurs in a lava field is as follows:
Moss and lichen arrive by birds to barren lava field; Soil is created; Fountain grass grows; Monkeypod trees grow.
Learn more about ecological succession at: brainly.com/question/18240055
